Park bexjamdv



(No Model.)

P. BENJAMIN.

ATELEPHONE' CASE.

Y Patented Feb. 5

No. 293,136.A

v1 T .N IIE N R INT w .mi .1. A

WITNESSES i Letters Patent for the said telephone has been transverse section on the line g/ jz/ of Fig. l.

or case constructed of glass or analogous vitre- I n .UNrrE-n STATES Farmer @Errea Para; BENJAMIN, or NEW vonk, E.A Y.

TELEPHONE-CASE.

SPECIFICATION `forming part of Letters Patent No. 293,136, dated Febrry 5, 1884.

Application filed October 29, 1853.

To ai!) whom, t may concern.-

Be it known that I, PARK BENJAMIN, of the city, county, and State of New York, have `in-` vented a new and useful Improvement in Cases for Telephones, of which the following is a speciiication.`

The invention consists in a telephonebox ous material, and entirely inclosing theintcrnal mechanism of the instrument. The said box or case is preferably made in two parts, one inclosing the electrodes, magnets, circuit-connections, or other internal mechanism of the instrument, the other constituting the cover and containing the mouth-piece and mouth-piece orifice. n

In the accompanying drawings is represented aform of telephone-transmitter to which I apply my invention by constructing the cover E and the receptacle B, or either of them, of glass, in lieu of wood and iron or other material, respectively. This application exhibits one of the best means I now know for carrying the said invention into practical effect. The particular telephone here shown, in its operative parts, is the invention `ofDaniel Drawbaugh, and to this extent is disclaimed by me. I am aware that an application for iiled by the said Drawbaugh, to which application I refer for all details of' construction and operation.

Figure 1 of the drawings is afront view of a telephone-transmitter provided with my glass case, and having the cover and diaphragm removed. Fig. 2 is a sectional view of said instrument on the line :v x of Fig. 1. Fig. 3 is a Siniilar letters of'reference indicate like parts. I

A is the base or back board of the inst-rument.

B is the main portion of the inclosing-ease, which I construct of glass. I form this part in the forni shown, preferablyV in a glass-press or analogous molding-machine, by the aid of suitable dies, in the manner Well known in the manufacture of pressed glassware. Iam thus enabled to produce in the object while in the press the necessary recesses, indentations,

or holes. Such holes as cannot thus be made (No model.)

may afterward n be drilled 5 but it will be better soto design this part of the case that it `may be formed at once in proper shape in the press. rlhe form may, however, be varied, so as to be produced by blowing or other means.

The recesses, indentations, Src., above rcferred to are respectively shown in the drawings as containing the rubber pads C, the induction-coil Q, the electrodes I J, the rod K, and the ring or gasket F. The cover E, I also preferably form of glass or other vitreous ma terial. It is provided with a mouth-piece ori-v flee, G, and may have a flanged edge, as shown, to overlap the part B. cured to the part B by bolts and nuts Y, or by any other convenient means.

The construction and operation of the telephone liere shown as embodying my invention are as follows: n i

G is the diaphragm, which may be of metal, or of glass or mica. It is secured between the cover E and part `B of the case.V

H is a bracket, of metal, fastened on the rear side of said diaphragm, and supporting an annular cup-shaped carbon electrode, I, in which rests a bell-shaped carbon electrode, J. A rod, K, extends down through an aperture in the partB and terminates in a metal knob, M.

Nis another metal knob secured to a springarm, O, which is attached by a screw, P, to the ease B.

Q is the induction-coil.

D is a screw securing the rubber vblock C, there being three of, such blocks entering sockets in the case B.

YV is ahook to receive the ring of a receiving-instrument, which ring elevates the arm O, and so moves the carbons I and .I out of contact. Y

rlhe circuits in the instrument proceed as follows: From the battery to bindingpost I, by wire a to primary of induction-coil Q, by wire b to contact-piece T, to the diaphragm, to the bracket H, electrodes I and1 J, to rod K, arm O, wire d, binding-post 2, and battery. Secondary wires e e proceed from the induction-coil Q to the line binding-posts 3 4,

from which posts branch wires ff proceed to wire; such as might and often does occur when an electric-light wire becomes crossed with a telephone-wire and the powerful current on the former iinds its way into the instrument; third, the ease may be transparent, allowing easy inspection of all internal mechanisnrwithout taking the instrument apart; fourth, t-he case is of a material sufficiently heavy to oppose by its' inertia, when suitably supported, as in the instrument shown in the drawings, jars or shocks communicated to the partition Whereon the telephone may be secured; iifth, the case is formed of a material cheaper than metal or line woods, which may be molded or pressed into shape as easily as the former 5 sixth, the case may be ornamented by coloring introduced into the body of the material; seventh, all parts of the case, including the cover, being made of glass, the instrument is substantially wholly inclosed in an insulated non-inflammable envelope; eighth, the instrument may be placed in a position exposed to the weather without injury, the only care required being to hermetically seal the joints by suitable cement or otherwise; ninth, the glass case protects the working parts ofthe inst-rument from-the effects of moisture, and is not liable to contract or expand through differences intemperature'; tenth, the glass may be treated by any well-known toughening process, so as to render it exceedingly strong,and not liable to rupture from shocks or otherwise.

I claim as my invention- 1. A telephone-case formed of glass or similar vitreous material, provided with suitable recesses, indentations, or apertures for the reception of the workin g parts ofthe instrument, substantially as described.

2. A telephone-case formed of glass or similar vitreous material, pressed or molded into substantially a block, which block is provided with suitable recesses, indentations, or apertures for the reception of the working parts of the instruments, substantially as described.

3. A telephone box or case having a detachable cover containing a mouth piece and mouth-piece orifice, and a receptacle containing suitable recesses, apertures, or indentations for the reception of the working parts of the instrument, and a means of connecting said cover and receptacle,said receptacle and cover being formed of glass or similar vitreous material, substantially as described.

4. In a telephone, the receptacle B, provided with recesses, indentations, or apertures for the reception of the working. parts of the instrument,substantially as described,and made of pressed or molded glass or similar vitreous material. l

5. In a telephone, the cover E, having a mouth-piece and a mouth-piece opening, substantially as set forth, and made of pressed or molded glass.

6. In a telephone, a glass mouth-piece, substantially as described.

7. A telephone box or case constructed oi' transparent material, substantially as described.

8. A telephone box or case constructed of transparent non-inflammable material, substantially as described.

9. A telephone box or case constructed of transparent non-iniiammable insulating material, substantially as described.

PARK BENJAMIN.

Nitnessesz GEORG-E H. BENJAMIN, J. B. GHUnci-i. 

